Okay, I am trying to put together my shopping cart

I downloaded CubeCart and am trying to work on it in either Dreamweaver or the File Manager on my server. Either one will work but I'm CLUELESS as to where to start.

I don't know how to put this all together and make it work and the installation instructions may has well be written in Greek. I don't know where to start...there are two header.php and two index.php and two of this and two of that and you get the drift. HELP....I need someone to walk me thru this or I may just lose my mind.

I downloaded Cube Cart cause I can *mangle* the logo easier than I can the one on osCommerce. At least I did when I was using the server I had before but that one had it laid out where I could identify which files were which...now I am on my own. This isn't a Fantasico or C-panel. Liz